GAC matchmaking

I have to say this has been a serious problem for me. I'm a relatively new lvl 85. I have started a bit before the Mandalorian characters marquee events happened. Then I took a year and a half off. I've gotten back into it since an 2 months ago. I've only done a handful of grand arenas, however I've only won 2 hands. Why? Because my closest matchup has been someone with over 1 million gp more who made one attempt at one of my squads, who surprisingly beat him, and then he did nothing else. Their past behavior that has dropped them down to my Carbonite levels is not an indication that they won't destroy me effortlessly and reap the rewards of people like me. I won't say I'm good nor have a good roster. But you could give me a gl for free and I wouldn't stand a chance against a single one of the matchups I've had unless they don't play. And guess what, the argument everyone makes a these people not playing and all that....they do play when they drop down to Carbonite.